In the past, (Firefox 2) I had to manually set Firefox's proxy settings by hand regardless of how the OS X Network proxy settings were configured (Firefox wouldn't honor the system settings).

Access Denied, You don’t have permission to access The issue occurs when Firefox uses different proxy settings or VPN instead of what is set on your Windows computer.

I have access to IE, Chrome and Firefox, all with the ZScaler certificate installed and proxy settings locked to use ZScaler.

If you're deep into your home lab journey with several self-hosted apps, you know that remembering all the URLs to access ...

Tech Computing Can't access the network through Safari, iTunes, etc., but can through Firefox? Check proxy settings Some apps use the Mac OS X proxy settings, others do not.